Edgar wall dorey



E. W. DOREY.

MARINE LOG.

APPLICATION FILED JAN. 6. 1919.

1 07,624. Patented June 24, 1919.

unm, WASHINGTON. u c

' nnrrnn- STATES rATENT oninon.

LIMITED, OF BIRMINGHAM, ENGLAND.

MARINE LOG".

To all whom it may concern:

Be it known that I, EDGAR WALL DoREY, a subject of the King of Great Britain, re-

siding at London, England, have invented certain new and useful Improvements in Marine Logs, of which the following is a specificatio This invention relates to those devices, generally known as marine logs, which are designed to indicate the speed of travel of 'ves-' sels at sea and the distance covered in any given time.

In devices of this kind a rotatingmember is trailed in the sea by means of a line or rope connected to an indicating device, the said rotator being so formed that it is caused to rotate at a speed proportional to the speed of-tra'vel of the vessel.

In marine logs as heretofore constructed the line is secured to the rotator in such a manner that the line is necessarily rotated by the rotator both when it is normally oper ating and also when it is being hauled in for inspection or for any other purpose. It has beenfound that with this construction when it is desired to haul in the rotator the line must be hauled in twice in order to free the line from the kinks produced by. its continued rotation while being hauled in. V

The object of the present invention is to provide a construction of marine log designed. so as to avoid the above] disadvantages. The improved marine log according to this invention is so constructedthat the line or 'rope is normally in engagement with and rotates with the rotator, but the construc tion is such that the line can be readily disengaged from the rotator and comprises a device for effecting the disengagement at will, for instance when hauling the rotator in, thus enabling the rotator to rotate independently of the line. 1

In the accompanying drawings:

Figure 1 is a longitudinal sectional view of a portion of the rotatable element of a marine log embodying the invention;

Figs. 4 and 5 are detail views'in side elevation of portions of the mechanism shown 1nFig.1.--

Referring now tothe drawings, the rotatable element of the log is shown as comprising a body portionl having the usual blades or vanes 2 and connected to the indicating device carried by the vessel by'means ofaropeo'rline3.

The forward end of the body portion 1 of the rotatable element is constituted by a cup-shaped member 4 screwed or otherwise securedto the body portion land a'olos'ing cap 5 provided with a screw-threaded portion v6 .coeperating with a corresponding screw-threaded portion 7 formed on the cupshaped member.

The closing cap 5 is so formed as to'p'rovide'a minimum of resistance to the passage 'of the rotatable element through the water.

The connection between the towing 'line 3 and the rotatable element 1' of the logis effected as follo-ws:

A hollow sleeve 8 having an enlarged portion or head 9 is provided, the portion 8 projecting through an opening 10 formed in the base of the cup-shaped 'member 4, the enlarged portion -01" headaeng'a in with the base of the cup-shaped inember4 and constituting an abutment for the end of the towing line 3,'which is secured to the sleeve 8 or the enlarged portion 9 either by means of the usual knot employecl'for securing the rotatable member to the line, or by other securing means. ':The inner end of EDGAR WALL DOREY, OF LONDON, ENGLAND, ASSIG-NOR TO THOMAS WALKER & SON E Specification of Letters Patent. P t t J 24,. 1 919, Application filed Januar 6, 1919. Serial No. 269,755.

the hollow sleeve 8 is cut away as indicated at 11 in Fig. 4 to form a sector-shaped projection'or extension 12' for a purposewhich will be hereinafter explained.

Located in an opening formedintheinterior of the closing cap 5 and surrounding the towing line 3 is a sleeve 13 having an enlarged sector-shaped projection or head 14 located within the interior of the cup-shaped member 4, the sleeve 13 being cut away as indicated at 15 in Fig. 5, and the extension or projection 14 being adapted in the position shown, to engage with the projection 12 on the sleeve 8 in such manner that the rotary movement of the sleeve 13 is transmitted to the sleeve 8.

The sector-shaped projection 14 offfthe sleeve 13 is adapted to bear against the inner face 17 0t theycltsmg cap -5iinwhi'chpo'sition' a portion '18 of the sleeve projects beyond the end of the closing cap 5.

JThe rotarymovement of the sleeve13 relatively to the closing cap;5;is in the position of the parts shown in Fig. 1 limited by a stop or projection 19 (see Fig. 3) thelon'gitudinal displacement ofthe sleeve 13 being adapted to free" the" sleeve from engagement with the stop 19. A s ring. 20 which may be one of a number 6 similar'sprin 's, is adapted to bear, against the lateral face of 'herp i eh 1. hi h s ve 13 h to maintain the same in the position shown.

Referring nqw particularly to Fig; 2', a fl t pl i t; d s sho h h t firth a sle ve 2 the t hr tih' Q ter ed as to surround the towing line 3 and to maintain med a. Zl hhhhi h flh at eh a gl the axis of the towing l1ne when the'rel eash deti in PQ t Q o e l e;

I operation or this form of the invent h s as th lh s I a ih rmt lz rhxt t eh e r t h e e st Wte-hy e es e hi th h way; the m t t ty lht ohs n; th Par Oftht tt tah felem n lh smi t d by mews of the line to the indicating. device carried by. he .YQSSt l emt IY meittme being t ansm tte rom. he body r rt pn t 1p.-s are hemh a d t q qs g ap 5, whichfas before explained are rigidly coneet t a ate tathe lhs t 3- li 'e' h projection 19 formed on the closing cap. 5, to

the leeve; 3. wh h ie ehhttttd o th tline ee h the hdl tt n d ti f e ves el T e rstt r m ment Sleeve 13 transmittedgto the sleeve 8 by. reason tthe cQ p t tl thQ QQ Y S QPQdPEQ' .jections 12 and lfiformed; on the sleeves 8 Whenit isdesiredgtp haulin the log either for inspection orother purposes'the releasna evi t tqhstith h lq y, h disk 21 and sleeve22lji's permitted to travel down the line ;3-,a long which itis carried by the action of the vessel traveling through the water as will be readilyunderstood. There easing device may beinor mally c arrie d on the-line adjacent to the indicating device or. may ,be placed on the line only when it is desired to. efle ct the release of they par'ts. The releasing device will consequently be broughtqinto engagement witht e extens on 1 8 of the sleeve 13 which already explained, projects somewhat. heyondlthe closing cap 5 forcing the sleeve into the interior of i a the cup-shaped member 4, thereby "removing thedsecton hared dmfjprhi c i t m ngagementfwit'h jthe stop .19 formed on the inner Wall ofjzhe closing cap 5.

It should be notedtthat flthespring 20 hea in ts i st th nner ace of, the enbe moved to a position to permit of such longitudinal displacement on the part of the sleeve 13 but the spring 20 and such additionalsprings as may be provided are only of such strength as to maintain the sleeve 13 in the position shown aganist the action of the water acting upon the outer extremity 18 of the sleeve so that a sharp blow such as would be imparted to it by contact with the releasing device will be suflicient to' effect the release of this spring or springs and the consequent longitudinal displacement of the sleeve 13 in the manner described. V

When thestop orp'rojection 19 is notin engagement with the enlarged sector-shaped portion or head 14 of the sleeve, 13 the'l in'e is no longer rotated by therotation of the rotatableelement of the log and thereis no tendency for the line tobecome, k i'nlged during the hauling-in operation, the rotatable element being free to rotate'upon the sleeves sand. '13. h

Fain the, ab'oye. description it will be apparent that simple and effective means are provided for releasingthe rotatable element of thelo'g from the towingline'so as regard sj the rotary movement of the rotatable transmitted to the lineethus. avoiding thef'disadv'antage associated; with legs of this description in the past. whereby it has been necessary,be'fore the line could be coiled awa to first'clear thelineof kinks imparted to itby the rotation of the' rotat'able'element of the log during the, hauling-in operation "moreover "damage to the line in such circumstances is avoided.

llhe inlentionfhas been describedyasembodied in a standard form. t. rotatable element, the body portion of 'therotat'able' elgrnfejnt'constituting the housingforf releasing device.

It With be "understood however, that: the

i vention, is not limitedfto the employment of particular, former-ma netism for Preventing the rotary movement:ofi therota- I he element, be n n mitted, to he n nor fto the employment; of any particular construction of releasing device and modifications in these, and other respects ma be .made with inj wide limits without; exceeding ther sjcope of the invention. I claim:

1.1 A marine log comprising i a rotatable element, a registering device, a. fiefiilqle Iconnectionior transmitting rotary Indvement between .said rotatable element and said registering (167108, and means. for preventing the rotary movement of the, rotatable ele ment from the flexible member at any time during operation. I

3. In a marine log the combination of a rotatable element, a registering device, a flexible connection between said registering device and said rotatable element, clutch mechanism interposed between the end of the flexible connection and said rotatable element, and means for effecting the discon nection of the clutch mechanism at any time during operation.

4. In a marine log, the combination of a rotatable element, adapted to be towed by the vessel, a registering device, a flexible connection between said rotatable element and said registering device, clutch mechanism interposed between the end of the flexible connection and the rotatable element, and means for preventing the rotary movement of the rotatable element being transmitted to the registering device through the flexible connection at any desired time.

5. In a marine log, the combination of a rotatable element adapted to be towed by the vessel, a registering device, a flexible connection between said rotatable element and the registering device, clutch mechanism interposed between the end of the flexible connection and the rotatable element, and means dependent for its operation upon the passage of the ship through the water for effecting the operation of the clutch mechanism.

6. In a marine log, the combination of a rotatable element adapted to be towed by the vessel, a registering device located on the vessel, a flexible connection interposed between the rotatable element and the registering device, clutch mechanism located in the rotatable element, and means for preventing the rotary movement of the rotatable element being transmitted to the registering device at any desired time.

7. In a marine log, the combination of a rotatable element adapted to be towed by the vessel, a registering device located on the vessel, a flexible connection between said ro-. tatable element and the registering device, clutch mechanism interposed between the end of the flexible connection and the rotatable element, and means for efiecting the operation of the clutch mechanism from a point adjacent to the registering device.

8. In a marine log, the combination of a rotatable element adapted to be towed by the vessel, a registering device, a flexible connection between said rotatable element and said registering device, clutch mechanism interposed between the end of the flexible connection and the rotatable element, and a device adapted to travel along the flexible con nection for effecting the operation of the clutch mechanism. 7

9. In a marine log, the combination of a rotatable element adapted to be towed by the.

vessel, a registering device, means for transmitting therotary'moveinent of the rotatable'element to the registering device and means for preventing the transmission of said rotary movement at any time during operation.

10. In a marine log, the combination of a rotatable element, a registering device operating in conjunction therewith, a flexible connection between said rotatable element and said "registering device, clutch mechanism located in said rotatable element for transmitting the rotary movement of the rotatable element to the flexible connection, and adevice adapted to travel along the flexible connection for eflecting the disengagement of the clutch mechanism.

11. In a marine log, the combination of a rotatable element, a registering device operating in conjunction therewith, a flexible connection between said rotatable element and the registering device, clutch mechanism located in the rotatable element, a projection on said rotatable element for eflecting the operation of the clutch mechanism, and a device adapted to cooperate with said projection for eflecting the disengagement of the clutch mechanism.

, 12. In a marine log, the combination of a rotatable element adapted to be towed by the vessel, a registering device, a flexible connection between said registering device and said rotatable element, means for insuring the transmission of the rotary movement of the rotatable element to the flexible connection, and a device dependent for its operation on the passage of the ship through the water, for preventing the rotary movement of the rotatable element being transmitted to the registering device at any desired time.

13. In a marine log, the combination of a rotatable element, a registering device operating in conjunction therewith, a flexible connection between said rotatable element and said registering device, clutch mechanism between the flexible connection and the rotatable element for transmitting the rotary movement of the rotatable element to the flexible connection, and a device adapted to travel along the flexible connection for effecting the disengagement of the clutch mechanism.-

14. In a marine log, the combination of a rotatable element adapted to be towed by the vessel, a registering device, a flexible connection between said rotatable element and the registering device, clutch mechanism interposed between the flexible connection and the rotatable element and a disk-shaped member adapted to travel along the flexible connection for disengaging said clutch mechanism. I

15. In a marine log, the combination of a rotatable element adapted to be towed by the vessel, a registering device, a flexible con- In"v witnesswhereof-I have hereunto setmy hand in presence of nectionlbetween said rotatable element and the registering device, clutch mechanism interposed between the; flexible connection and nesses. 1, i t the rotatable element and a disk-shaped r 1 1 member adapted to travel along the flexible ED connection under the action of the passage Witnesses ARTHUR JAM-Es HALL,-

of the vessel through the Water for disengag- ELSIE A.- PATRICK.-

ing said clutch mechanism Copies of this patent may be obtained for fire cents eachrhy addressing the Commissioner of Patents,

' Washington, .D. G. t

two subscribing, Wit- 10 i 

